I LOVED the idea. Read the real post on it. I took all the readers' reviews and advice to heart and headed to Hobby Lobby.CLEAR GLYCERIN (soap row...8.99 for 32 oz...use coupon = 5.00), 3 gel paste food coloring (Wilton row....AmeriColor...1.49each) in LEAF GREEN, ELECTRIC ORANGE, & ROYAL BLUE. I only bought bright colors, since they recommended they show up the best in the tub.
Other items you will need: microwavable bowl (glass is best), plastic spoon, long ice cube tray (mine is from Ikea, but many say you can get this same ice cube tray for water bottles at a dollar store. Target may carry them too), and optional Essential Oils (but I forgot to add mine in..oops.).
It took barely an hour for mine to harden completely on the counter. But, it is best left to sit out for at least 4 hours at room temperature.
I had a little extra orange glycerin in my trials, so I made flower shaped crayons too.
Test Results:First row: the Bright Orange crayon, when tile and crayon are dry
Second Row: The Leaf Green crayon, when tile and crayon are dry
Third Row: (my favorite): The Royal Blue crayon, when tile and crayon are dry
Here is how the colors show up on our white tub. Pretty good.
And here is my cute "Crayon Tester":
My 12 month old stood up right away, and seemed to know right away what to do with those bathtub crayons! Kept him occupied for an extra 15 minutes!!!
When the crayons get wet, you can see that it does create a BIG mess. I will make them completely a bath-only-toy. When the crayons fell into the tub, their color dye ran too, changing the tub water color instantly. And, these crayons should never be put into the mouth (the glycerin uunfortunately says not, non-toxic).
And it does wipe clean very easily with water. So, for less than $10, you can probably have bathtub crayons for years, more to give away as gifts, and lots of bath time fun for your little ones!
Oh, and I have been sewing...just will share that with you next : )!